package com.hy.logtrace.aspect;

import com.hy.logtrace.domain.TraceWrapper;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@ControllerAdvice
public class TraceResponseBodyAdvice implements ResponseBodyAdvice<Object> {

    private final TraceWrapper traceWrapper;

    public TraceResponseBodyAdvice(TraceWrapper traceWrapper) {
        this.traceWrapper = traceWrapper;
    }

    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        // 对所有返回值生效
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,
                                  Class<? extends HttpMessageConverter<?>> selectedConverterType,
                                  ServerHttpRequest request, ServerHttpResponse response) {
        // 包装返回值
        traceWrapper.wrapObject(body);
        return traceWrapper;
    }
}